Pole-indicator for electric conductors



(No Model.)

A. BERGHAUSEN. POLE INDICATOR FOR ELECTRIC OOND UGTORS.

No. 376,281. Patented Jan. 10, 1888.

WITNESSES:

#TTOR/VEYS:

UNITED STATES AUGUST BERGHAUSEN, OF ELBERFELD, GERMANY, ASSIGNOR TO E. IMHAUSER, OF BROOKLYN, NEW' YORK.

POLE-INDICATOR FOR ELECTRIOCONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 376,281, dated January 10, 18$ 8.

Serial No.250.390. (No model.)

To aZZ whom it may concern: v

Be it known that 1, AUGUST BERGHAUSEN, at prese'ntresiding i n Elberteldfiermany, have invented an Improved Pole-Indicator for Electric Conductors, 0f whieh the following is a fulldescription, reference being had to the accompanying drawings, in which Figure 1 isaside view of my improved poleindicator. Fig. 2 is a longitudinal central section of the same. Fig. 3 is a erosssection of the same, taken on the line 0 c, Fig. 1.

This invention relates to a new instrument which will indicate by color the poles of an electric conductor without necessitating the employment ofa galvanometcr. It frequently happens that it becomes necessary in telegraphlines and the like to ascertain at any part of the line distant from the battery in which direction the positive and in which the negative pole of the line may be located. By my invention this can be done with'great'ease.

Theinvention consists ol'a transparent eha1nbcr containing a liqnid-such as glycerine and oil or the like-into which dip from opposite sides platinum pinsthat arecounected with the conductor to be tested.

In the dawings, the letter A represents a glass tube secured to suitable caps, B and O,

and containing a filling of oil and glycerine or the like. The capB carriesa platinum point, a, which dipsinto this mixture. A similar platinum point, 1), extends into the mixture from the cap O.

D is a wire connected with the cap B, and E a wire connected with the cap 0. These wires are fastened to the respective caps by common screws or the like, and are not essential parts of my instrument, because the wires to be tested may be directly clamped to the caps.

If thepoles of the dynamo or of a conductor mixture contained in the vessel. Thus by cutting a wire, bringing the cut ends, respectively, into metallic contact with the caps B O, the observer may readily see, by noting which of the two platinum points becomes discolored, which is the negative and which the positive pole of his conductor. Instead of platinum points, other metallic or other points or projections may be used with substantially the same efiect.

I claim- I a The pole-indicator for electric conductors,

consisting of the transparent vessel A, containing an oily liquid, substantially as herein described, said "essel A having caps B G, from which extend thepoints a 1) into the liquid contained in said glass vessel, as specified. The above specification of my invention signed by me this 2d day of August, 1887.

A. BER-GHAUSEN.

Witnesses:

A. S. MUNN, EMIL ZUNGS. 

